Your LLM's confidence score is lying to you
Article summary
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The most expensive bug in an LLM system is not the output that is obviously broken. That one you catch. It is the fluent, well formed, confidently wrong answer that reads exactly like a correct one and walks straight into your system of record because nothing was standing between the model and production. "Reads correct" and "is correct" are two different properties, and the model only optimizes the first. So the answer that is almost right, the near miss, comes back just as polished as the…
1Key Takeaways
- The most expensive bug in an LLM system is not the output that is obviously broken.
- It is the fluent, well formed, confidently wrong answer that reads exactly like a correct one and walks straight into your system of record because nothing was standing between the model and production.
- "Reads correct" and "is correct" are two different properties, and the model only optimizes the first.
- So the answer that is almost right, the near miss, comes back just as polished as the….
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — ML reports that the most expensive bug in an LLM system is not the output that is obviously broken.
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